Broadband Access Aggregation and DSL Configuration Guide, Cisco IOS XE Release 3S
Monitoring PPPoE Sessions with SNMP
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Monitoring PPPoE Sessions with SNMP

Contents

Monitoring PPPoE Sessions with SNMP

The PPPoE Session Count Management Information Base feature provides the ability to use Simple Network Management Protocol (SNMP) to monitor in real time the number of PPP over Ethernet (PPPoE) sessions configured on permanent virtual circuits (PVCs) and on a router.

The SNMP Traps for PPPoE Session Limits feature provides SNMP MIB support for the PPPoE session limits and generates notifications in case the limits are reached.

This MIB also supports two SNMP traps that generate notification messages when a PPPoE session-count threshold is reached on any PVC or on the router. The PPPoE session-count thresholds can be configured using the sessions max limit and pppoe max-sessions commands.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

Prerequisites for Monitoring PPPoE Sessions with SNMP

  • You must understand the concepts described in the Preparing for Broadband Access Aggregation module.
  • PPPoE sessions must be established using the procedures in the Providing Protocol Support for Broadband Access Aggregation of PPPoE Session s module.

Restrictions for Monitoring PPPoE Sessions with SNMP

The snmp-server enable traps pppoe command enables SNMP traps only. It does not support inform requests.

Information About Monitoring PPPoE Sessions with SNMP

Network Management Protocol

SNMP is a network management protocol used almost exclusively in TCP/IP networks. SNMP provides a means to monitor and control network devices and to manage configurations, statistics collection, performance, and security. SNMP version 2 supports centralized and distributed network management strategies and includes improvements in the Structure of Management Information (SMI), protocol operations, management architecture, and security.

PPPoE Session Count MIB

A MIB is a database of network management information that is used and maintained by a network management protocol, such as SNMP. The value of a MIB object can be changed or retrieved using SNMP commands, usually through a network management system.

The PPPoE Session Count MIB uses two SNMP traps that generate notification messages when a PPPoE session-count threshold is reached on any PVC or on the router. The PPPoE session-count thresholds can be configured using the sessions max limit and pppoe max-sessions commands. You can also set per-MAC session and IWF limits for a PPPoE session, per-MAC throttle rate limit for a PPPoE session, per-VLAN session configuration limit, per-VLAN throttle rate limit, per-VC session configuration limit, and per-VC throttle rate limit configuration limit.

The table below describes the objects and tables supported by the PPPoE Session-Count MIB. For a complete description of the MIB, see the PPPoE Sessions Management MIB file CISCO-PPPOE-MIB.my, available through Cisco.com at the following URL: http:/​/​tools.cisco.com/​ITDIT/​MIBS/​servlet/​index.

Table 1 PPPoE Session Count MIB Objects and Tables

Object or Table

Description

cPppoeSystemCurrSessions

Number of PPPoE sessions active on the router.

cPppoeSystemHighWaterSessions

Highest number of PPPoE sessions configured at a particular time after the system was initialized.

cPppoeSystemMaxAllowedSessions

Number of PPPoE sessions configurable on the router.

cPppoeSystemThresholdSessions

Threshold value of PPPoE sessions configurable on the router.

cPppoeSystemExceededSessionErrors

Accumulated number of errors on the router that have occurred because the cPppoeSystemCurrSessions value exceeded the cPppoeSystemMaxAllowedSessions value.

cPppoeSystemPerMacSessionlimit

Per-MAC session limit for a PPPoE session

cPppoeSystemPerMacIWFSessionlimit

Per-MAC session IWF limit for a PPPoE session

cPppoeSystemPerMacThrottleRatelimit

Per-MAC throttle rate limit for a PPPoE session

cPppoeSystemPerVLANlimit

Per-VLAN session configuration limit

cPppoeSystemPerVLANthrottleRatelimit

Per-VLAN throttle rate limit

cPppoeSystemPerVClimit

Per-VC session configuration limit

cPppoeSystemPerVCThrottleRatelimit

Per-VC throttle rate limit configuration limit

cPppoeVcCfgTable

PPPoE protocol-related configuration information about the virtual channel links (VCLs).

cPppoeVcSessionsTable

Configuration information and statistics about the number of PPPoE sessions on the VCLs.

cPppoeSystemSessionThresholdTrap

Generates a notification message when the number of PPPoE sessions on the router reaches the configured threshold value.

cPppoeVcSessionThresholdTrap

Generates a notification message when the number of PPPoE sessions on the PVC reaches the configured threshold value.

Benefits of Monitoring PPPoE Sessions with SNMP

The monitoring of PPPoE sessions with SNMP provides the following benefits:

  • It helps manage the number of PPPoE sessions configured on a router or PVC by sending notification messages when the PPPoE session threshold has been reached.
  • It provides a way of tracking PPPoE session information over time.

How to Configure Monitoring of PPPoE Sessions with SNMP

Configuring the PPPoE Session-Count Threshold for the Router

Perform this task to configure the PPPoE session-count threshold for the router.


Note


The sessions max limit command is available only if you configure the bba-group pppoe command using the global keyword.


SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    snmp-server enable traps pppoe

    4.    bba-group pppoe {group-name | global}

    5.    sessions max limit session-number [threshold threshold-value]

    6.    virtual-template template-number

    7.    end

    8.    more system:running-config


DETAILED STEPS
     Command or ActionPurpose
    Step 1 enable


    Example:
    Router> enable
     

    Enables privileged EXEC mode.

    • Enter your password if prompted.
     
    Step 2 configure terminal


    Example:
    Router# configure terminal
     

    Enters global configuration mode.

     
    Step 3 snmp-server enable traps pppoe


    Example:
    Router(config)# snmp-server enable traps pppoe 
     

    (Optional) Enables PPPoE session count SNMP notifications.

    • This command enables SNMP traps that send notification messages when PPPoE sessions have been reached.
     
    Step 4 bba-group pppoe {group-name | global}


    Example:
    Router(config)# bba-group pppoe global
     

    Configures a BBA group to be used to establish PPPoE sessions and enters BBA group configuration mode.

     
    Step 5 sessions max limit session-number [threshold threshold-value]


    Example:
    Router(config-bba-group)# sessions max limit 4000 threshold 3000
     

    Configures the PPPoE global profile with the maximum number of PPPoE sessions permitted on a router and sets the PPPoE session-count threshold at which an SNMP trap will be generated.

    Note   

    This command applies only to the global profile.

     
    Step 6 virtual-template template-number


    Example:
    Router(config-bba-group)# virtual-template 1
     

    Specifies the virtual template that will be used to clone the virtual access interfaces (VAI).

     
    Step 7 end


    Example:
    Router(config-bba-group)# end
     

    Exits BBA group configuration mode and returns to privileged EXEC mode.

     
    Step 8 more system:running-config


    Example:
    Router(#) more system:running-config
     

    Displays the running configuration and the PPPoE session-count thresholds.

     

    Configuring the PPPoE Session-Count Threshold for a PVC

    Perform this task to configure the PPPoE session-count threshold for a PVC.

    SUMMARY STEPS

      1.    enable

      2.    configure terminal

      3.    snmp-server enable traps pppoe

      4.    interface atm slot / subslot / port [.subinterface] [multipoint | point-to-point]

      5.    pvc [name] vpi / vci

      6.    pppoe max-sessions number-of-sessions [threshold-sessions number-of-sessions]

      7.    protocol pppoe

      8.    end

      9.    more system:running-config


    DETAILED STEPS
       Command or ActionPurpose
      Step 1 enable


      Example:
      Router> enable
       

      Enables privileged EXEC mode.

      • Enter your password if prompted.
       
      Step 2 configure terminal


      Example:
      Router# configure terminal
       

      Enters global configuration mode.

       
      Step 3 snmp-server enable traps pppoe


      Example:
      Router(config)# snmp-server enable traps pppoe 
       

      (Optional) Enables PPPoE session count SNMP notifications.

      • This command enables SNMP traps that send notification messages when PPPoE session thresholds have been reached.
       
      Step 4 interface atm slot / subslot / port [.subinterface] [multipoint | point-to-point]


      Example:
      Router(config)# interface atm 0/0/0.3 point-to-point
       

      Configures the ATM interface and enters subinterface configuration mode.

       
      Step 5 pvc [name] vpi / vci


      Example:
      Router(config-subif)# pvc 5/120
       

      Creates an ATM PVC and enters ATM VC configuration mode.

       
      Step 6 pppoe max-sessions number-of-sessions [threshold-sessions number-of-sessions]


      Example:
      Router(config-if-atm-vc)# pppoe max-sessions 5 threshold-sessions 3
       

      Sets the maximum number of PPPoE sessions that will be permitted on an ATM PVC, PVC range, VC class, or VLAN, and sets the PPPoE session-count threshold at which an SNMP trap will be generated.

       
      Step 7 protocol pppoe


      Example:
      Router(config-if-atm-vc)# protocol pppoe
       

      Enables PPPoE sessions to be established on ATM PVCs.

       
      Step 8 end


      Example:
      Router(config-if-atm-vc)# end
       

      (Optional) Exits ATM VC configuration mode and returns to sub interface mode.

       
      Step 9 more system:running-config


      Example:
      Router(#) more system:running-config
       

      Displays the running configuration and the PPPoE session-count thresholds.

       

      Configuring the PPPoE Session-Count Threshold for a VC Class

      Perform this task to configure the PPPoE session-count threshold for a VC class.

      SUMMARY STEPS

        1.    enable

        2.    configure terminal

        3.    snmp-server enable traps pppoe

        4.    vc-class atm name

        5.    pppoe max-sessions number-of-sessions [threshold-sessions number-of-sessions]

        6.    protocol pppoe [group group-name | global]

        7.    end

        8.    more system:running-config


      DETAILED STEPS
         Command or ActionPurpose
        Step 1 enable


        Example:
        Router> enable
         

        Enables privileged EXEC mode.

        • Enter your password if prompted.
         
        Step 2 configure terminal


        Example:
        Router# configure terminal
         

        Enters global configuration mode.

         
        Step 3 snmp-server enable traps pppoe


        Example:
        Router(config)# snmp-server enable traps pppoe 
         

        (Optional) Enables PPPoE session count SNMP notifications.

        • This command enables SNMP traps that send notification messages when PPPoE session thresholds have been reached.
         
        Step 4 vc-class atm name


        Example:
        Router(config)# vc-class atm main
        
         

        Creates a VC class for an ATM PVC, or SVC, or ATM interface and enters VC class configuration mode.

         
        Step 5 pppoe max-sessions number-of-sessions [threshold-sessions number-of-sessions]


        Example:
        Router(config-vc-class)# pppoe max-sessions 7 threshold-sessions 3
         

        Sets the maximum number of PPPoE sessions that will be permitted on an ATM PVC, PVC range, VC class, or VLAN, and sets the PPPoE session-count threshold at which an SNMP trap will be generated.

         
        Step 6 protocol pppoe [group group-name | global]


        Example:
        Router(config-vc-class)# protocol pppoe group one
         

        Enables PPPoE sessions to be established.

         
        Step 7 end


        Example:
        Router(config-vc-class)# end
         

        (Optional) Exits VC class configuration mode and returns to privileged EXEC mode.

         
        Step 8 more system:running-config


        Example:
        Router(#) more system:running-config
         

        Displays the running configuration and the PPPoE session-count thresholds.

         

        Configuring the PPPoE Session-Count Threshold for an ATM PVC Range

        SUMMARY STEPS

          1.    enable

          2.    configure terminal

          3.    snmp-server enable traps pppoe

          4.    interface atm slot / subslot / port [.subinterface] [multipoint | point-to-point]

          5.    range [range-name] pvc start-vpi / start-vci end-vpi / end-vci

          6.    pppoe max-sessions number-of-sessions [threshold-sessions number-of-sessions]

          7.    protocol pppoe [group group-name | global]

          8.    end

          9.    more system:running-config


        DETAILED STEPS
           Command or ActionPurpose
          Step 1 enable


          Example:
          Router> enable
           

          Enables privileged EXEC mode.

          • Enter your password if prompted.
           
          Step 2 configure terminal


          Example:
          Router# configure terminal
           

          Enters global configuration mode.

           
          Step 3 snmp-server enable traps pppoe


          Example:
          Router(config)# snmp-server enable traps pppoe 
           

          (Optional) Enables PPPoE session count SNMP notifications.

          • This command enables SNMP traps that send notification messages when PPPoE session thresholds have been reached.
           
          Step 4 interface atm slot / subslot / port [.subinterface] [multipoint | point-to-point]


          Example:
          Router(config)# interface atm 0/0/0.3 point-to-point
           

          Configures the ATM interface and enters the subinterface configuration mode.

           
          Step 5 range [range-name] pvc start-vpi / start-vci end-vpi / end-vci


          Example:
          Router(config-subif)# range pvc 3/100 3/105 
           

          Defines a range of ATM PVCs and enters ATM PVC range configuration mode.

           
          Step 6 pppoe max-sessions number-of-sessions [threshold-sessions number-of-sessions]


          Example:
          Router(config-if-atm-range)# pppoe max-sessions 20 threshold-sessions 15
           

          Sets the maximum number of PPPoE sessions that will be permitted on an ATM PVC, PVC range, VC class, or VLAN, and sets the PPPoE session-count threshold at which an SNMP trap will be generated.

           
          Step 7 protocol pppoe [group group-name | global]


          Example:
          Router(config-if-atm-range)# protocol pppoe group two
           

          Enables PPPoE sessions to be established.

           
          Step 8 end


          Example:
          Router(config-if-atm-range)# end
           

          (Optional) Exits ATM PVC range configuration mode and returns to privileged EXEC mode.

           
          Step 9 more system:running-config


          Example:
          Router(#) more system:running-config
           

          Displays the running configuration and the PPPoE session-count thresholds.

           

          Configuring the PPPoE Session-Count Threshold for an Individual PVC Within a Range

          Perform this task to configure the PPPoE session-count threshold for an individual PVC within an ATM PVC range.

          SUMMARY STEPS

            1.    enable

            2.    configure terminal

            3.    snmp-server enable traps pppoe

            4.    interface atm slot / subslot / port [.subinterface] [multipoint | point-to-point]

            5.    range [range-name] pvc start-vpi / start-vci end-vpi /end-vci

            6.    pvc-in-range [pvc-name] [vpi / vci]

            7.    pppoe max-sessions number-of-sessions [threshold-sessions number-of-sessions]

            8.    end

            9.    more system:running-config


          DETAILED STEPS
             Command or ActionPurpose
            Step 1 enable


            Example:
            Router> enable
             

            Enables privileged EXEC mode.

            • Enter your password if prompted.
             
            Step 2 configure terminal


            Example:
            Router# configure terminal
             

            Enters global configuration mode.

             
            Step 3 snmp-server enable traps pppoe


            Example:
            Router(config)# snmp-server enable traps pppoe 
             

            (Optional) Enables PPPoE session count SNMP notifications.

            • This command enables SNMP traps that send notification messages when PPPoE session thresholds have been reached.
             
            Step 4 interface atm slot / subslot / port [.subinterface] [multipoint | point-to-point]


            Example:
            Router(config)# interface atm 6/0.110 multipoint
             

            Configures the ATM interface and enters subinterface configuration mode.

             
            Step 5 range [range-name] pvc start-vpi / start-vci end-vpi /end-vci


            Example:
            Router(config-subif)# range range1 pvc 3/100 4/199 
             

            Defines a range of ATM PVCs and enters ATM PVC Range configuration mode.

             
            Step 6 pvc-in-range [pvc-name] [vpi / vci]


            Example:
            Router(config-if-atm-range)# pvc-in-range pvc1 3/104
             

            Configures an individual PVC within a PVC range and enters ATM PVC-in-range configuration mode.

             
            Step 7 pppoe max-sessions number-of-sessions [threshold-sessions number-of-sessions]


            Example:
            Router(cfg-if-atm-range-pvc)# pppoe max-sessions 10 threshold-sessions 5
             

            Sets the maximum number of PPPoE sessions that will be permitted on an ATM PVC, PVC range, VC class, or VLAN, and sets the PPPoE session-count threshold at which an SNMP trap will be generated.

             
            Step 8 end


            Example:
            Router(cfg-if-atm-range-pvc)# end
             

            (Optional) Exits ATM PVC-in-range configuration mode and returns to privileged EXEC mode.

             
            Step 9 more system:running-config


            Example:
            Router(#) more system:running-config
             

            Displays the running configuration and the PPPoE session-count thresholds.

             

            Monitoring and Maintaining PPPoE Session Counts and SNMP Notifications

            Perform the following task to monitor PPPoE sessions counts and SNMP notifications.

            SUMMARY STEPS

              1.    enable

              2.    debug snmp packets

              3.    debug pppoe errors [rmac remote-mac-address | interface type number [vc {[vpi /]vci | vc-name}] [vlan vlan-id]]

              4.    debug pppoe events [rmac remote-mac-address | interface type number [vc {[vpi /]vci | vc-name}] [vlan vlan-id]]

              5.    show vpdn session

              6.    show pppoe session


            DETAILED STEPS
              Step 1   enable

              Use this command to enable privileged EXEC mode. Enter your password when prompted.



              Example:
              Router> enable
              
              Step 2   debug snmp packets

              Use this command to display information about every SNMP packet sent or received by the router:



              Example:
              Router# debug snmp packets
              SNMP: Packet received via UDP from 192.0.2.11 on GigabitEthernet1/0 
              SNMP: Get-next request, reqid 23584, errstat 0, erridx 0 
               sysUpTime = NULL TYPE/VALUE 
               system.1 = NULL TYPE/VALUE 
               system.6 = NULL TYPE/VALUE
              SNMP: Response, reqid 23584, errstat 0, erridx 0 
               sysUpTime.0 = 2217027 
               system.1.0 = Cisco Internetwork Operating System Software 
               system.6.0 = 
              SNMP: Packet sent via UDP to 192.0.2.11
              
              Step 3   debug pppoe errors [rmac remote-mac-address | interface type number [vc {[vpi /]vci | vc-name}] [vlan vlan-id]]

              Use this command to display PPPoE protocol errors that prevent a session from being established or errors that cause an established session to be closed.



              Example:
              Router# debug pppoe errors interface atm 1/0.10 
              PPPoE protocol errors debugging is on 
              Router# 
              00:44:30:PPPoE 0:Max session count(1) on mac(00b0.c2e9.c470) reached. 
              00:44:30:PPPoE 0:Over limit or Resource low. R:00b0.c2e9.c470 L:ffff.ffff.ffff 0/101 
              ATM1/0.10 

              Step 4   debug pppoe events [rmac remote-mac-address | interface type number [vc {[vpi /]vci | vc-name}] [vlan vlan-id]]

              Use this command to display PPPoE protocol messages about events that are part of normal session establishment or shutdown:



              Example:
              Router# debug pppoe events interface atm 1/0.10 vc 101
              
              PPPoE protocol events debugging is on 
              Router# 
              00:41:55:PPPoE 0:I PADI  R:00b0.c2e9.c470 L:ffff.ffff.ffff 0/101 ATM1/0.10 
              00:41:55:PPPoE 0:O PADO, R:00b0.c2e9.c470 L:0001.c9f0.0c1c 0/101 ATM1/0.10 
              00:41:55:PPPoE 0:I PADR  R:00b0.c2e9.c470 L:0001.c9f0.0c1c 0/101 ATM1/0.10 
              00:41:55:PPPoE :encap string prepared 
              00:41:55:[3]PPPoE 3:Access IE handle allocated 
              00:41:55:[3]PPPoE 3:pppoe SSS switch updated 
              00:41:55:[3]PPPoE 3:AAA unique ID allocated 
              00:41:55:[3]PPPoE 3:No AAA accounting method list 
              00:41:55:[3]PPPoE 3:Service request sent to SSS 
              00:41:55:[3]PPPoE 3:Created  R:0001.c9f0.0c1c L:00b0.c2e9.c470 0/101 ATM1/0.10 
              00:41:55:[3]PPPoE 3:State REQ_NASPORT    Event MORE_KEYS 
              00:41:55:[3]PPPoE 3:O PADS  R:00b0.c2e9.c470 L:0001.c9f0.0c1c 0/101 ATM1/0.10 
              00:41:55:[3]PPPoE 3:State START_PPP    Event DYN_BIND 
              00:41:55:[3]PPPoE 3:data path set to PPP 
              00:41:57:[3]PPPoE 3:State LCP_NEGO    Event PPP_LOCAL 
              00:41:57:PPPoE 3/SB:Sent vtemplate request on base Vi2 
              00:41:57:[3]PPPoE 3:State CREATE_VA    Event VA_RESP 
              00:41:57:[3]PPPoE 3:Vi2.1 interface obtained 
              00:41:57:[3]PPPoE 3:State PTA_BIND    Event STAT_BIND 
              00:41:57:[3]PPPoE 3:data path set to Virtual Access 
              00:41:57:[3]PPPoE 3:Connected PTA 
              
              Step 5   show vpdn session

              Use this command to display information about active Level 2 Forwarding (L2F) protocol tunnel and message identifiers on a VPDN:



              Example:
              Router# show vpdn session
              %No active L2TP tunnels
              %No active L2F tunnels
              PPPoE Session Information Total tunnels 1 sessions 1
              PPPoE Session Information
              SID        RemMAC          LocMAC       Intf    VASt    OIntf    VC
              1       0010.7b01.2cd9  0090.ab13.bca8  Vi4     UP      AT6/0   0/10
              
              Step 6   show pppoe session

              Use this command to display information about the currently active PPPoE sessions:



              Example:
              Router# show pppoe session
                   3 sessions in LOCALLY_TERMINATED (PTA) State
                   3 sessions total
               
              Uniq ID  PPPoE  RemMAC          Port            VT  VA         State
                         SID  LocMAC                              VA-st      Type
                    1      1  0007.b3dc.a41c  ATM0/3/1.100     1  Vi2.1      PTA  
                              001a.3045.0331  VC: 99/100          UP              
                    2      2  0007.b3dc.a41c  ATM0/3/1.100     1  Vi2.2      PTA  
                              001a.3045.0331  VC: 99/100          UP              
                    3      3  0007.b3dc.a41c  ATM0/3/1.100     1  Vi2.3      PTA  
                              001a.3045.0331  VC: 99/100          UP              
              Router#

              Configuration Examples for Monitoring PPPoE Sessions with SNMP

              Example: Configuring PPPoE Session-Count SNMP Traps

              The following example shows how to enable the router to send PPPoE session-count SNMP notifications to the host at the address 192.10.2.10:

              snmp-server community public RW
              snmp-server enable traps pppoe
              snmp-server host 192.10.2.10 version 2c public udp-port 1717

              Example: Configuring PPPoE Session-Count Threshold for the Router

              The following example shows a limit of 4000 PPPoE sessions configured for the router. The PPPoE session-count threshold is set at 3000 sessions, so when the number of PPPoE sessions on the router reaches 3000, an SNMP trap will be generated.

              bba-group pppoe pppoe1
               sessions max limit 4000 threshold 3000
               virtual-template 1
              pppoe limit max-sessions 4000 threshold-sessions 3000
              

              Example: Configuring PPPoE Session-Count Threshold for a PVC

              The following example shows a limit of five PPPoE sessions configured for the PVC. The PPPoE session-count threshold is set at three sessions, so when the number of PPPoE sessions on the PVC reaches three, an SNMP trap will be generated.

              interface ATM 0/0/0
               ip address 10.0.0.1 255.255.255.0
               no atm ilmi-keepalive
               pvc 5/120
                protocol ip 10.0.0.2 broadcast 
                pppoe max-sessions 5 threshold-sessions 3
                protocol pppoe
              

              Example: Configuring PPPoE Session-Count Threshold for a VC Class

              The following example shows a limit of seven PPPoE sessions configured for a VC class called "main." The PPPoE session-count threshold is set at three sessions, so when the number of PPPoE sessions for the VC class reaches three, an SNMP trap will be generated.

              vc-class atm main
                protocol pppoe group global
              vc-class atm global
                protocol pppoe
                pppoe max-sessions 7 threshold-sessions 3

              Example: Configuring PPPoE Session-Count Threshold for a PVC Range

              The following example shows a limit of 20 PPPoE sessions configured for the PVC range. The PPPoE session-count threshold will also be 20 sessions because when the session-count threshold has not been explicitly configured, it defaults to the PPPoE session limit. An SNMP trap will be generated when the number of PPPoE sessions for the range reaches 20.

              interface ATM 0/0/0.3 point-to-point
               range pvc 3/100 3/105
                pppoe max-sessions 20 threshold-sessions 15
                protocol pppoe
              

              PPPoE Session-Count Threshold for an Individual PVC Within a PVC Range Example

              The following example shows a limit of ten PPPoE sessions configured for pvc1. The PPPoE session-count threshold is set at three sessions, so when the number of PPPoE sessions for the PVC reaches three, an SNMP trap will be generated.

              interface atm 6/0.110 multipoint
               range range1 pvc 100 4/199
                pvc-in-range pvc1 3/104
                 pppoe max-sessions 10 threshold-sessions 3

              Where to Go Next

              • If you want to establish PPPoE session limits for sessions on a specific PVC or VLAN configured on an L2TP access concentrator, refer to the "Establishing PPPoE Session Limits per NAS Port" module.
              • If you want to use service tags to enable a PPPoE server to offer PPPoE clients a selection of service during call setup, refer to the "Offering PPPoE Clients a Selection of Services During Call Setup" module.
              • If you want to enable an L2TP access concentrator to relay active discovery and service selection functionality for PPPoE over an L2TP control channel to a LNS or tunnel switch, refer to the "Enabling PPPoE Relay Discovery and Service Selection Functionality" module.
              • If you want to configure the transfer upstream of the PPPoX session speed value, refer to the "Configuring Upstream Connection Speed Transfer" module.
              • If you want to identify a physical subscriber line for RADIUS communication with a RADIUS server, refer to the "Identifying the Physical Subscriber Line for RADIUS Access and Accounting" module.
              • If you want to configure a Cisco Subscriber Service Switch, refer to the "Configuring Cisco Subscriber Service Switch Policies" module.

              Additional References

              The following sections provide references related to monitoring PPPoE sessions with SNMP.

              Related Documents

              Related Topic

              Document Title

              Broadband access aggregation concepts

              Understanding Broadband Access Aggregation

              Tasks for preparing for broadband access aggregation

              Preparing for Broadband Access Aggregation

              Configuring PPPoE sessions

              Providing Protocol Support for Broadband Access Aggregation of PPPoE Sessions

              Establishing PPPoE session limits for sessions on a specific PVC or VLAN configured on an L2TP access concentrator

              Establishing PPPoE Session Limits per NAS Port

              Using service tags to enable a PPPoE server to offer PPPoE clients a selection of service during call setup

              Offering PPPoE Clients a Selection of Services During Call Setup

              Enabling an L2TP access concentrator to relay active discovery and service selection functionality for PPPoE over an L2TP control channel to a LNS or tunnel switch

              Enabling PPPoE Relay Discovery and Service Selection Functionality

              Configuring the transfer upstream of the PPPoX session speed value

              Configuring Upstream Connection Speed Transfer

              Identifying a physical subscriber line for RADIUS communication with a RADIUS server

              Identifying the Physical Subscriber Line for RADIUS Access and Accounting

              Configuring a Cisco Subscriber Service Switch

              Configuring Cisco Subscriber Service Switch Policies

              Standards

              Standards

              Title

              None

              --

              MIBs

              MIBs

              MIBs Link

              PPPoE Session Count MIB

              To locate and download MIBs for selected platforms, Cisco IOS XE software releases, and feature sets, use Cisco MIB Locator found at the following URL:

              http:/​/​tools.cisco.com/​ITDIT/​MIBS/​servlet/​index http://tools.cisco.com/ITDIT/MIBS/servlet/index

              RFCs

              RFCs

              Title

              None

              --

              Technical Assistance

              Description

              Link

              The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies.

              To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds.

              Access to most tools on the Cisco Support website requires a Cisco.com user ID and password.

              http:/​/​www.cisco.com/​techsupport

              Feature Information for Monitoring PPPoE Sessions with SNMP

              The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

              Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

              Table 2 Feature Information for Monitoring PPPoE Sessions with SNMP

              Feature Name

              Releases

              Feature Configuration Information

              PPPoE Session Count MIB,

              SNMP Traps for PPPoE Session Limits

              Cisco IOS XE Release 2.5.0

              Cisco IOS XE Release 2.6

              This feature was introduced on Cisco ASR 1000 Series Aggregation Routers.

              This feature provides the ability to use SNMP to monitor in real time the number of PPP over Ethernet sessions configured on PVCs and on a router. You can also retrieve information from the MIB.

              The SNMP Traps for PPPoE Session Limits feature implements SNMP MIB support for the PPPoE session limits and generates notifications in case the limits are reached.

              The following commands were introduced or modified:

              snmp-server enable traps pppoe